- Source: 2018 Nielsen Pro Tennis Championship
- 2018 Nielsen Pro Tennis Championship
- 2018 Nielsen Pro Tennis Championship – Singles
- 2018 Nielsen Pro Tennis Championship – Doubles
- 2017 Nielsen Pro Tennis Championship – Doubles
- 2019 Nielsen Pro Tennis Championship – Doubles
- 2017 Nielsen Pro Tennis Championship – Singles
- Nielsen Pro Tennis Championship
- 2019 Nielsen Pro Tennis Championship – Singles
- 2019 Nielsen Pro Tennis Championship
- 2017 Nielsen Pro Tennis Championship
The 2018 Nielsen Pro Tennis Championship was a professional tennis tournament played on hard courts. It was the 27th edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Winnetka, Illinois, between 9 and 14 July 2018.
Singles main-draw entrants
= Seeds
=1 Rankings are as of July 2, 2018.
= Other entrants
=The following players received wildcards into the singles main draw:
Tom Fawcett
Martin Joyce
Thai-Son Kwiatkowski
Danny Thomas
The following players received entry into the singles main draw using protected rankings:
Tom Jomby
Nicolas Meister
The following players received entry from the qualifying draw:
Collin Altamirano
Aziz Dougaz
Guy Orly Iradukunda
Martin Redlicki
Champions
= Singles
=Evgeny Karlovskiy def. Jason Jung 6–3, 6–2.
= Doubles
=Austin Krajicek / Jeevan Nedunchezhiyan def. Roberto Maytín / Christopher Rungkat 6–7(4–7), 6–4, [10–5].